How much does solar and battery cost in the UK in 2026?

A basic solar and battery system costs an estimated £7,844.50 in 2026 for a 5.17 kWp array with a 5 kWh battery. It pays back in around 7.9 years.

Three system sizes

• Essential: 3.29 kWp solar with 5 kWh battery, for smaller homes with lower usage
• Enhanced: 5.17 kWp with 5 kWh, for average homes
• Maximum: 7.05 kWp with 15 kWh, for larger homes adding EVs or heat pumps

The report modelled the Enhanced size: £946 a year in savings, a 7.9 year payback and a 10.2% internal rate of return.

What the price covers

Panels and mounting, inverter, battery, installation labour and electrical work, and the cabling, monitoring and isolators that complete the system. 0% VAT applies until 31 March 2027.

Does location change the cost?

Hardware costs are broadly similar nationwide. Returns differ with sunlight: Torbay and Maidstone see payback of about 6.6 years, while Scotland sees about 8.4 years.

Reducing the upfront cost

0% VAT, plus Smart Export Guarantee payments of roughly 5 to 15p per kWh exported.

Frequently asked questions

Is that the total cost?

It is an estimate for a full system including labour and electrical work. Treat it as a benchmark, not a quote.

Is it worth it if payback is over 7.5 years?

Yes. Every region analysed delivers positive long-term returns. A longer payback just means more years to break even.

All figures are modelled estimates for typical UK rooftops, not guarantees for any individual home. Rules, funding and eligibility can change, so check current government and supplier guidance before deciding.

Next guide: Am I eligible for free or subsidised solar panels in the UK? →